diff --git a/ci/test/00_setup_env_mac.sh b/ci/test/00_setup_env_mac.sh
index 0ada280c185ff..9d6d88a788b6b 100644
--- a/ci/test/00_setup_env_mac.sh
+++ b/ci/test/00_setup_env_mac.sh
@@ -10,8 +10,8 @@ export CONTAINER_NAME=ci_macos_cross
 export DOCKER_NAME_TAG=ubuntu:18.04  # Check that bionic can cross-compile to macos (bionic is used in the gitian build as well)
 export HOST=x86_64-apple-darwin18
 export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python3-dev python3-setuptools xorriso"
-export XCODE_VERSION=11.3.1
-export XCODE_BUILD_ID=11C505
+export XCODE_VERSION=12.1
+export XCODE_BUILD_ID=12A7403
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
 export GOAL="deploy"
diff --git a/contrib/gitian-build.py b/contrib/gitian-build.py
index d498c9e2c821e..65c8495349e7e 100644
--- a/contrib/gitian-build.py
+++ b/contrib/gitian-build.py
@@ -209,7 +209,7 @@ def main():
     args.macos = 'm' in args.os
 
     # Disable for MacOS if no SDK found
-    if args.macos and not os.path.isfile('gitian-builder/inputs/Xcode-11.3.1-11C505-extracted-SDK-with-libcxx-headers.tar.gz'):
+    if args.macos and not os.path.isfile('gitian-builder/inputs/Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz'):
         print('Cannot build for MacOS, SDK does not exist. Will build for other OSes')
         args.macos = False
 
diff --git a/contrib/gitian-descriptors/gitian-osx.yml b/contrib/gitian-descriptors/gitian-osx.yml
index 1ee651dab74a3..3a389d7c14e4c 100644
--- a/contrib/gitian-descriptors/gitian-osx.yml
+++ b/contrib/gitian-descriptors/gitian-osx.yml
@@ -34,7 +34,7 @@ remotes:
 - "url": "https://github.com/cyberyen/cyberyen.git"
   "dir": "cyberyen"
 files:
-- "Xcode-11.3.1-11C505-extracted-SDK-with-libcxx-headers.tar.gz"
+- "Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz"
 script: |
   set -e -o pipefail
 
@@ -92,7 +92,7 @@ script: |
   BASEPREFIX="${PWD}/depends"
 
   mkdir -p ${BASEPREFIX}/SDKs
-  tar -C ${BASEPREFIX}/SDKs -xf ${BUILD_DIR}/Xcode-11.3.1-11C505-extracted-SDK-with-libcxx-headers.tar.gz
+  tar -C ${BASEPREFIX}/SDKs -xf ${BUILD_DIR}/Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz
 
   # Build dependencies for each host
   for i in $HOSTS; do
@@ -149,12 +149,12 @@ script: |
     cd installed
     find . -name "lib*.la" -delete
     find . -name "lib*.a" -delete
-    
+
     # Cyberyen: Delete libbitcoin from binary distribution for now, see #192
     rm -rf ${DISTNAME:?}/lib/
     rm -rf ${DISTNAME}/include/
     # Cyberyen: ends
-    
+
     rm -rf ${DISTNAME}/lib/pkgconfig
     find ${DISTNAME} | sort | tar --mtime="$REFERENCE_DATETIME" --no-recursion --mode='u+rw,go+r-w,a+X' --owner=0 --group=0 -c -T - | gzip -9n > ${OUTDIR}/${DISTNAME}-${i}.tar.gz
     cd ../../
diff --git a/contrib/guix/README.md b/contrib/guix/README.md
index dffcf99607ae2..1ab68b4938e1c 100644
--- a/contrib/guix/README.md
+++ b/contrib/guix/README.md
@@ -126,10 +126,27 @@ find output/ -type f -print0 | sort -z | xargs -r0 sha256sum
 
 * _**MAX_JOBS**_
 
-  Override the maximum number of jobs to run simultaneously, you might want to
-  do so on a memory-limited machine. This may be passed to `make` as in `make
-  --jobs="$MAX_JOBS"` or `xargs` as in `xargs -P"$MAX_JOBS"`. _(defaults to the
-  value of `nproc` outside the container)_
+  Set the depends tree cache for built packages. This is passed through to the
+  depends tree. Setting this to the same directory across multiple builds of the
+  depends tree can eliminate unnecessary building of packages.
+
+* _**SDK_PATH**_
+
+  Set the path where _extracted_ SDKs can be found. This is passed through to
+  the depends tree. Note that this is should be set to the _parent_ directory of
+  the actual SDK (e.g. SDK_PATH=$HOME/Downloads/macOS-SDKs instead of
+  $HOME/Downloads/macOS-SDKs/Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers).
+
+* _**JOBS**_
+
+  Override the number of jobs to run simultaneously, you might want to do so on
+  a memory-limited machine. This may be passed to:
+
+  - `guix` build commands as in `guix environment --cores="$JOBS"`
+  - `make` as in `make --jobs="$JOBS"`
+  - `xargs` as in `xargs -P"$JOBS"`
+
+  _(defaults to the value of `nproc` outside the container)_
 
 * _**SOURCE_DATE_EPOCH**_
 
diff --git a/contrib/macdeploy/README.md b/contrib/macdeploy/README.md
index eeac733a462f0..f0892ce3aa415 100644
--- a/contrib/macdeploy/README.md
+++ b/contrib/macdeploy/README.md
@@ -17,9 +17,9 @@ When complete, it will have produced `Cyberyen-Qt.dmg`.
 ### Step 1: Obtaining `Xcode.app`
 
 Our current macOS SDK
-(`Xcode-11.3.1-11C505-extracted-SDK-with-libcxx-headers.tar.gz`) can be
+(`Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz`) can be
 extracted from
-[Xcode_11.3.1.xip](https://download.developer.apple.com/Developer_Tools/Xcode_11.3.1/Xcode_11.3.1.xip).
+[Xcode_12.1.xip](https://download.developer.apple.com/Developer_Tools/Xcode_12.1/Xcode_12.1.xip).
 An Apple ID is needed to download this.
 
 After Xcode version 7.x, Apple started shipping the `Xcode.app` in a `.xip`
@@ -31,25 +31,25 @@ approach (tested on Debian Buster) is outlined below:
 apt install cpio
 git clone https://github.com/bitcoin-core/apple-sdk-tools.git
 
-# Unpack Xcode_11.3.1.xip and place the resulting Xcode.app in your current
+# Unpack Xcode_12.1.xip and place the resulting Xcode.app in your current
 # working directory
-python3 apple-sdk-tools/extract_xcode.py -f Xcode_11.3.1.xip | cpio -d -i
+python3 apple-sdk-tools/extract_xcode.py -f Xcode_12.1.xip | cpio -d -i
 ```
 
 On macOS the process is more straightforward:
 
 ```bash
-xip -x Xcode_11.3.1.xip
+xip -x Xcode_12.1.xip
 ```
 
-### Step 2: Generating `Xcode-11.3.1-11C505-extracted-SDK-with-libcxx-headers.tar.gz` from `Xcode.app`
+### Step 2: Generating `Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz` from `Xcode.app`
 
-To generate `Xcode-11.3.1-11C505-extracted-SDK-with-libcxx-headers.tar.gz`, run
+To generate `Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz`, run
 the script [`gen-sdk`](./gen-sdk) with the path to `Xcode.app` (extracted in the
 previous stage) as the first argument.
 
 ```bash
-# Generate a Xcode-11.3.1-11C505-extracted-SDK-with-libcxx-headers.tar.gz from
+# Generate a Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz from
 # the supplied Xcode.app
 ./contrib/macdeploy/gen-sdk '/path/to/Xcode.app'
 ```
@@ -60,7 +60,7 @@ Working macOS DMGs are created in Linux by combining a recent `clang`, the Apple
 
 Apple uses `clang` extensively for development and has upstreamed the necessary
 functionality so that a vanilla clang can take advantage. It supports the use of `-F`,
-`-target`, `-mmacosx-version-min`, and `--sysroot`, which are all necessary when
+`-target`, `-mmacosx-version-min`, and `-isysroot`, which are all necessary when
 building for macOS.
 
 Apple's version of `binutils` (called `cctools`) contains lots of functionality missing in the
@@ -80,7 +80,7 @@ and its `libLTO.so` rather than those from `llvmgcc`, as it was originally done
 
 To complicate things further, all builds must target an Apple SDK. These SDKs are free to
 download, but not redistributable. To obtain it, register for an Apple Developer Account,
-then download [Xcode_11.3.1](https://download.developer.apple.com/Developer_Tools/Xcode_11.3.1/Xcode_11.3.1.xip).
+then download [Xcode_12.1.xip](https://download.developer.apple.com/Developer_Tools/Xcode_12.1/Xcode_12.1.xip).
 
 This file is many gigabytes in size, but most (but not all) of what we need is
 contained only in a single directory:
diff --git a/depends/Makefile b/depends/Makefile
index 1ad21f6821bba..abece089c4c14 100644
--- a/depends/Makefile
+++ b/depends/Makefile
@@ -126,6 +126,8 @@ $(host_arch)_$(host_os)_id_string+=$(shell $(host_RANLIB) --version 2>/dev/null)
 $(host_arch)_$(host_os)_id_string+=$(shell $(host_STRIP) --version 2>/dev/null)
 
 ifneq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
+# Make sure that cache is invalidated when switching between system and
+# depends-managed, pinned clang
 build_id_string+=system_clang
 $(host_arch)_$(host_os)_id_string+=system_clang
 endif
@@ -163,12 +165,6 @@ $(host_arch)_$(host_os)_native_toolchain?=$($(host_os)_native_toolchain)
 
 include funcs.mk
 
-binutils_path=$($($(host_arch)_$(host_os)_native_binutils)_prefixbin)
-ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
-toolchain_path=$($($(host_arch)_$(host_os)_native_toolchain)_prefixbin)
-else
-toolchain_path=
-endif
 final_build_id_long+=$(shell $(build_SHA256SUM) config.site.in)
 final_build_id+=$(shell echo -n "$(final_build_id_long)" | $(build_SHA256SUM) | cut -c-$(HASH_LENGTH))
 $(host_prefix)/.stamp_$(final_build_id): $(native_packages) $(packages)
@@ -179,30 +175,60 @@ $(host_prefix)/.stamp_$(final_build_id): $(native_packages) $(packages)
 	$(AT)cd $(@D); $(foreach package,$^, tar xf $($(package)_cached); )
 	$(AT)touch $@
 
+# $PATH is not preserved between ./configure and make by convention. Its
+# modification and overriding at ./configure time is (as I understand it)
+# supposed to be captured by the AC_{PROG_{,OBJ}CXX,PATH_{PROG,TOOL}} macros,
+# which will expand the program names to their full absolute paths. The notable
+# exception is command line overriding: ./configure CC=clang, which skips the
+# program name expansion step, and works because the user implicitly indicates
+# with CC=clang that clang will be available in $PATH at all times, and is most
+# likely part of the user's system.
+#
+# Therefore, when we "seed the autoconf cache"/"override well-known program
+# vars" by setting AR=<blah> in our config.site, either one of two things needs
+# to be true for the build system to work correctly:
+#
+#   1. If we refer to the program by name (e.g. AR=riscv64-gnu-linux-ar), the
+#      tool needs to be available in $PATH at all times.
+#
+#   2. If the tool is _**not**_ expected to be available in $PATH at all times
+#      (such as is the case for our native_cctools binutils tools), it needs to
+#      be referred to by its absolute path, such as would be output by the
+#      AC_PATH_{PROG,TOOL} macros.
+#
+# Minor note: it is also okay to refer to tools by their absolute path even if
+# we expect them to be available in $PATH at all times, more specificity does
+# not hurt.
 $(host_prefix)/share/config.site : config.site.in $(host_prefix)/.stamp_$(final_build_id)
 	$(AT)@mkdir -p $(@D)
 	$(AT)sed -e 's|@HOST@|$(host)|' \
-            -e 's|@CC@|$(toolchain_path)$(host_CC)|' \
-            -e 's|@CXX@|$(toolchain_path)$(host_CXX)|' \
-            -e 's|@AR@|$(binutils_path)$(host_AR)|' \
-            -e 's|@RANLIB@|$(binutils_path)$(host_RANLIB)|' \
-            -e 's|@NM@|$(binutils_path)$(host_NM)|' \
-            -e 's|@STRIP@|$(binutils_path)$(host_STRIP)|' \
-            -e 's|@build_os@|$(build_os)|' \
-            -e 's|@host_os@|$(host_os)|' \
-            -e 's|@CFLAGS@|$(strip $(host_CFLAGS) $(host_$(release_type)_CFLAGS))|' \
-            -e 's|@CXXFLAGS@|$(strip $(host_CXXFLAGS) $(host_$(release_type)_CXXFLAGS))|' \
-            -e 's|@CPPFLAGS@|$(strip $(host_CPPFLAGS) $(host_$(release_type)_CPPFLAGS))|' \
-            -e 's|@LDFLAGS@|$(strip $(host_LDFLAGS) $(host_$(release_type)_LDFLAGS))|' \
-            -e 's|@allow_host_packages@|$(ALLOW_HOST_PACKAGES)|' \
-            -e 's|@no_qt@|$(NO_QT)|' \
-            -e 's|@no_qr@|$(NO_QR)|' \
-            -e 's|@no_zmq@|$(NO_ZMQ)|' \
-            -e 's|@no_wallet@|$(NO_WALLET)|' \
-            -e 's|@no_upnp@|$(NO_UPNP)|' \
-            -e 's|@multiprocess@|$(MULTIPROCESS)|' \
-            -e 's|@debug@|$(DEBUG)|' \
-            $< > $@
+	    -e 's|@CC@|$(host_CC)|' \
+	    -e 's|@CXX@|$(host_CXX)|' \
+	    -e 's|@AR@|$(host_AR)|' \
+	    -e 's|@RANLIB@|$(host_RANLIB)|' \
+	    -e 's|@NM@|$(host_NM)|' \
+	    -e 's|@STRIP@|$(host_STRIP)|' \
+	    -e 's|@CC@|$(toolchain_path)$(host_CC)|' \
+	    -e 's|@CXX@|$(toolchain_path)$(host_CXX)|' \
+	    -e 's|@AR@|$(binutils_path)$(host_AR)|' \
+	    -e 's|@RANLIB@|$(binutils_path)$(host_RANLIB)|' \
+	    -e 's|@NM@|$(binutils_path)$(host_NM)|' \
+	    -e 's|@STRIP@|$(binutils_path)$(host_STRIP)|' \
+	    -e 's|@build_os@|$(build_os)|' \
+	    -e 's|@host_os@|$(host_os)|' \
+	    -e 's|@CFLAGS@|$(strip $(host_CFLAGS) $(host_$(release_type)_CFLAGS))|' \
+	    -e 's|@CXXFLAGS@|$(strip $(host_CXXFLAGS) $(host_$(release_type)_CXXFLAGS))|' \
+	    -e 's|@CPPFLAGS@|$(strip $(host_CPPFLAGS) $(host_$(release_type)_CPPFLAGS))|' \
+	    -e 's|@LDFLAGS@|$(strip $(host_LDFLAGS) $(host_$(release_type)_LDFLAGS))|' \
+	    -e 's|@allow_host_packages@|$(ALLOW_HOST_PACKAGES)|' \
+	    -e 's|@no_qt@|$(NO_QT)|' \
+	    -e 's|@no_qr@|$(NO_QR)|' \
+	    -e 's|@no_zmq@|$(NO_ZMQ)|' \
+	    -e 's|@no_wallet@|$(NO_WALLET)|' \
+	    -e 's|@no_upnp@|$(NO_UPNP)|' \
+	    -e 's|@multiprocess@|$(MULTIPROCESS)|' \
+	    -e 's|@debug@|$(DEBUG)|' \
+	    $< > $@
 	$(AT)touch $@
 
 
diff --git a/depends/builders/darwin.mk b/depends/builders/darwin.mk
index f4103fc1f27ee..001c928424251 100644
--- a/depends/builders/darwin.mk
+++ b/depends/builders/darwin.mk
@@ -1,5 +1,5 @@
-build_darwin_CC:=$(shell xcrun -f clang) --sysroot $(shell xcrun --show-sdk-path)
-build_darwin_CXX:=$(shell xcrun -f clang++) --sysroot $(shell xcrun --show-sdk-path)
+build_darwin_CC:=$(shell xcrun -f clang) -isysroot$(shell xcrun --show-sdk-path)
+build_darwin_CXX:=$(shell xcrun -f clang++) -isysroot$(shell xcrun --show-sdk-path)
 build_darwin_AR:=$(shell xcrun -f ar)
 build_darwin_RANLIB:=$(shell xcrun -f ranlib)
 build_darwin_STRIP:=$(shell xcrun -f strip)
@@ -10,8 +10,8 @@ build_darwin_SHA256SUM=shasum -a 256
 build_darwin_DOWNLOAD=curl --location --fail --connect-timeout $(DOWNLOAD_CONNECT_TIMEOUT) --retry $(DOWNLOAD_RETRIES) -o
 
 #darwin host on darwin builder. overrides darwin host preferences.
-darwin_CC=$(shell xcrun -f clang) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(shell xcrun --show-sdk-path)
-darwin_CXX:=$(shell xcrun -f clang++) -mmacosx-version-min=$(OSX_MIN_VERSION) -stdlib=libc++ --sysroot $(shell xcrun --show-sdk-path)
+darwin_CC=$(shell xcrun -f clang) -mmacosx-version-min=$(OSX_MIN_VERSION) -isysroot$(shell xcrun --show-sdk-path)
+darwin_CXX:=$(shell xcrun -f clang++) -mmacosx-version-min=$(OSX_MIN_VERSION) -stdlib=libc++ -isysroot$(shell xcrun --show-sdk-path)
 darwin_AR:=$(shell xcrun -f ar)
 darwin_RANLIB:=$(shell xcrun -f ranlib)
 darwin_STRIP:=$(shell xcrun -f strip)
diff --git a/depends/config.site.in b/depends/config.site.in
index 87a337930370e..fc1d56645a95d 100644
--- a/depends/config.site.in
+++ b/depends/config.site.in
@@ -1,67 +1,67 @@
-depends_prefix="`dirname ${ac_site_file}`/.."
+depends_prefix="`dirname "$ac_site_file"`/.."
 
 cross_compiling=maybe
-host_alias=@HOST@
-ac_tool_prefix=${host_alias}-
+host_alias="@HOST@"
+ac_tool_prefix="${host_alias}-"
 
-if test -z $with_boost; then
-  with_boost=$depends_prefix
+if test -z "$with_boost"; then
+  with_boost="$depends_prefix"
 fi
-if test -z $with_qt_plugindir; then
-  with_qt_plugindir=$depends_prefix/plugins
+if test -z "$with_qt_plugindir"; then
+  with_qt_plugindir="${depends_prefix}/plugins"
 fi
-if test -z $with_qt_translationdir; then
-  with_qt_translationdir=$depends_prefix/translations
+if test -z "$with_qt_translationdir"; then
+  with_qt_translationdir="${depends_prefix}/translations"
 fi
-if test -z $with_qt_bindir && test -z "@no_qt@"; then
-  with_qt_bindir=$depends_prefix/native/bin
+if test -z "$with_qt_bindir" && test -z "@no_qt@"; then
+  with_qt_bindir="${depends_prefix}/native/bin"
 fi
-if test -z $with_mpgen && test -n "@multiprocess@"; then
-  with_mpgen=$depends_prefix/native
+if test -z "$with_mpgen" && test -n "@multiprocess@"; then
+  with_mpgen="${depends_prefix}/native"
 fi
 
-if test -z $with_qrencode && test -n "@no_qr@"; then
+if test -z "$with_qrencode" && test -n "@no_qr@"; then
   with_qrencode=no
 fi
 
-if test -z $enable_wallet && test -n "@no_wallet@"; then
+if test -z "$enable_wallet" && test -n "@no_wallet@"; then
   enable_wallet=no
 fi
 
-if test -z $enable_multiprocess && test -n "@multiprocess@"; then
+if test -z "$enable_multiprocess" && test -n "@multiprocess@"; then
   enable_multiprocess=yes
 fi
 
-if test -z $with_miniupnpc && test -n "@no_upnp@"; then
+if test -z "$with_miniupnpc" && test -n "@no_upnp@"; then
   with_miniupnpc=no
 fi
 
-if test -z $with_gui && test -n "@no_qt@"; then
+if test -z "$with_gui" && test -n "@no_qt@"; then
   with_gui=no
 fi
 
-if test -z $enable_zmq && test -n "@no_zmq@"; then
+if test -z "$enable_zmq" && test -n "@no_zmq@"; then
   enable_zmq=no
 fi
 
-if test x@host_os@ = xdarwin; then
+if test "x@host_os@" = xdarwin; then
   BREW=no
   PORT=no
 fi
 
-PATH=$depends_prefix/native/bin:$PATH
-PKG_CONFIG="`which pkg-config` --static"
+PATH="${depends_prefix}/native/bin:${PATH}"
+PKG_CONFIG="$(which pkg-config) --static"
 
 # These two need to remain exported because pkg-config does not see them
 # otherwise. That means they must be unexported at the end of configure.ac to
 # avoid ruining the cache. Sigh.
-export PKG_CONFIG_PATH=$depends_prefix/share/pkgconfig:$depends_prefix/lib/pkgconfig
+export PKG_CONFIG_PATH="${depends_prefix}/share/pkgconfig:${depends_prefix}/lib/pkgconfig"
 if test -z "@allow_host_packages@"; then
-  export PKG_CONFIG_LIBDIR=$depends_prefix/lib/pkgconfig
+  export PKG_CONFIG_LIBDIR="${depends_prefix}/lib/pkgconfig"
 fi
 
-CPPFLAGS="-I$depends_prefix/include/ $CPPFLAGS"
-LDFLAGS="-L$depends_prefix/lib $LDFLAGS"
+CPPFLAGS="-I${depends_prefix}/include/ ${CPPFLAGS}"
+LDFLAGS="-L${depends_prefix}/lib ${LDFLAGS}"
 
 if test -n "@CC@" -a -z "${CC}"; then
   CC="@CC@"
@@ -72,18 +72,18 @@ fi
 PYTHONPATH=$depends_prefix/native/lib/python3/dist-packages:$PYTHONPATH
 
 if test -n "@AR@"; then
-  AR=@AR@
-  ac_cv_path_ac_pt_AR=${AR}
+  AR="@AR@"
+  ac_cv_path_ac_pt_AR="${AR}"
 fi
 
 if test -n "@RANLIB@"; then
-  RANLIB=@RANLIB@
-  ac_cv_path_ac_pt_RANLIB=${RANLIB}
+  RANLIB="@RANLIB@"
+  ac_cv_path_ac_pt_RANLIB="${RANLIB}"
 fi
 
 if test -n "@NM@"; then
-  NM=@NM@
-  ac_cv_path_ac_pt_NM=${NM}
+  NM="@NM@"
+  ac_cv_path_ac_pt_NM="${NM}"
 fi
 
 if test -n "@debug@"; then
@@ -91,14 +91,14 @@ if test -n "@debug@"; then
 fi
 
 if test -n "@CFLAGS@"; then
-  CFLAGS="@CFLAGS@ $CFLAGS"
+  CFLAGS="@CFLAGS@ ${CFLAGS}"
 fi
 if test -n "@CXXFLAGS@"; then
-  CXXFLAGS="@CXXFLAGS@ $CXXFLAGS"
+  CXXFLAGS="@CXXFLAGS@ ${CXXFLAGS}"
 fi
 if test -n "@CPPFLAGS@"; then
-  CPPFLAGS="@CPPFLAGS@ $CPPFLAGS"
+  CPPFLAGS="@CPPFLAGS@ ${CPPFLAGS}"
 fi
 if test -n "@LDFLAGS@"; then
-  LDFLAGS="@LDFLAGS@ $LDFLAGS"
-fi
+  LDFLAGS="@LDFLAGS@ ${LDFLAGS}"
+fi
\ No newline at end of file
diff --git a/depends/funcs.mk b/depends/funcs.mk
index 58d882eb053ac..305aba472601c 100644
--- a/depends/funcs.mk
+++ b/depends/funcs.mk
@@ -1,17 +1,23 @@
 define int_vars
 #Set defaults for vars which may be overridden per-package
-$(1)_cc=$($($(1)_type)_CC)
-$(1)_cxx=$($($(1)_type)_CXX)
-$(1)_objc=$($($(1)_type)_OBJC)
-$(1)_objcxx=$($($(1)_type)_OBJCXX)
-$(1)_ar=$($($(1)_type)_AR)
-$(1)_ranlib=$($($(1)_type)_RANLIB)
-$(1)_libtool=$($($(1)_type)_LIBTOOL)
-$(1)_nm=$($($(1)_type)_NM)
-$(1)_cflags=$($($(1)_type)_CFLAGS) $($($(1)_type)_$(release_type)_CFLAGS)
-$(1)_cxxflags=$($($(1)_type)_CXXFLAGS) $($($(1)_type)_$(release_type)_CXXFLAGS)
-$(1)_ldflags=$($($(1)_type)_LDFLAGS) $($($(1)_type)_$(release_type)_LDFLAGS) -L$($($(1)_type)_prefix)/lib
-$(1)_cppflags=$($($(1)_type)_CPPFLAGS) $($($(1)_type)_$(release_type)_CPPFLAGS) -I$($($(1)_type)_prefix)/include
+$(1)_cc=$$($$($(1)_type)_CC)
+$(1)_cxx=$$($$($(1)_type)_CXX)
+$(1)_objc=$$($$($(1)_type)_OBJC)
+$(1)_objcxx=$$($$($(1)_type)_OBJCXX)
+$(1)_ar=$$($$($(1)_type)_AR)
+$(1)_ranlib=$$($$($(1)_type)_RANLIB)
+$(1)_libtool=$$($$($(1)_type)_LIBTOOL)
+$(1)_nm=$$($$($(1)_type)_NM)
+$(1)_cflags=$$($$($(1)_type)_CFLAGS) \
+	    $$($$($(1)_type)_$$(release_type)_CFLAGS)
+$(1)_cxxflags=$$($$($(1)_type)_CXXFLAGS) \
+	      $$($$($(1)_type)_$$(release_type)_CXXFLAGS)
+$(1)_ldflags=$$($$($(1)_type)_LDFLAGS) \
+	     $$($$($(1)_type)_$$(release_type)_LDFLAGS) \
+	     -L$$($($(1)_type)_prefix)/lib
+$(1)_cppflags=$$($$($(1)_type)_CPPFLAGS) \
+	      $$($$($(1)_type)_$$(release_type)_CPPFLAGS) \
+	      -I$$($$($(1)_type)_prefix)/include
 $(1)_recipe_hash:=
 endef
 
@@ -158,11 +164,11 @@ $(1)_autoconf += LDFLAGS="$$($(1)_ldflags)"
 endif
 
 $(1)_cmake=env CC="$$($(1)_cc)" \
-               CFLAGS="$$($(1)_cppflags) $$($(1)_cflags)" \
-               CXX="$$($(1)_cxx)" \
-               CXXFLAGS="$$($(1)_cppflags) $$($(1)_cxxflags)" \
-               LDFLAGS="$$($(1)_ldflags)" \
-             cmake -DCMAKE_INSTALL_PREFIX:PATH="$$($($(1)_type)_prefix)"
+	       CFLAGS="$$($(1)_cppflags) $$($(1)_cflags)" \
+	       CXX="$$($(1)_cxx)" \
+	       CXXFLAGS="$$($(1)_cppflags) $$($(1)_cxxflags)" \
+	       LDFLAGS="$$($(1)_ldflags)" \
+	     cmake -DCMAKE_INSTALL_PREFIX:PATH="$$($($(1)_type)_prefix)"
 ifneq ($($(1)_type),build)
 ifneq ($(host),$(build))
 $(1)_cmake += -DCMAKE_SYSTEM_NAME=$($(host_os)_cmake_system)
@@ -232,8 +238,8 @@ stages = fetched extracted preprocessed configured built staged postprocessed ca
 
 define ext_add_stages
 $(foreach stage,$(stages),
-          $(1)_$(stage): $($(1)_$(stage))
-          .PHONY: $(1)_$(stage))
+	  $(1)_$(stage): $($(1)_$(stage))
+	  .PHONY: $(1)_$(stage))
 endef
 
 # These functions create the build targets for each package. They must be
diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk
index e9faeba336d62..a97a309d615c8 100644
--- a/depends/hosts/darwin.mk
+++ b/depends/hosts/darwin.mk
@@ -1,11 +1,53 @@
 OSX_MIN_VERSION=10.14
-OSX_SDK_VERSION=10.15.1
-XCODE_VERSION=11.3.1
-XCODE_BUILD_ID=11C505
-LD64_VERSION=530
+OSX_SDK_VERSION=10.15.6
+XCODE_VERSION=12.1
+XCODE_BUILD_ID=12A7403
+LD64_VERSION=609
 
 OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers
 
+darwin_native_binutils=native_cctools
+
+ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
+# FORCE_USE_SYSTEM_CLANG is empty, so we use our depends-managed, pinned clang
+# from llvm.org
+
+# Clang is a dependency of native_cctools when FORCE_USE_SYSTEM_CLANG is empty
+darwin_native_toolchain=native_cctools
+
+clang_prog=$(build_prefix)/bin/clang
+clangxx_prog=$(clang_prog)++
+
+clang_resource_dir=$(build_prefix)/lib/clang/$(native_clang_version)
+else
+# FORCE_USE_SYSTEM_CLANG is non-empty, so we use the clang from the user's
+# system
+
+darwin_native_toolchain=
+
+# We can't just use $(shell command -v clang) because GNU Make handles builtins
+# in a special way and doesn't know that `command` is a POSIX-standard builtin
+# prior to 1af314465e5dfe3e8baa839a32a72e83c04f26ef, first released in v4.2.90.
+# At the time of writing, GNU Make v4.2.1 is still being used in supported
+# distro releases.
+#
+# Source: https://lists.gnu.org/archive/html/bug-make/2017-11/msg00017.html
+clang_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang")
+clangxx_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang++")
+
+clang_resource_dir=$(shell clang -print-resource-dir)
+endif
+
+cctools_TOOLS=AR RANLIB STRIP NM LIBTOOL OTOOL INSTALL_NAME_TOOL
+
+# Make-only lowercase function
+lc = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(subst G,g,$(subst H,h,$(subst I,i,$(subst J,j,$(subst K,k,$(subst L,l,$(subst M,m,$(subst N,n,$(subst O,o,$(subst P,p,$(subst Q,q,$(subst R,r,$(subst S,s,$(subst T,t,$(subst U,u,$(subst V,v,$(subst W,w,$(subst X,x,$(subst Y,y,$(subst Z,z,$1))))))))))))))))))))))))))
+
+# For well-known tools provided by cctools, make sure that their well-known
+# variable is set to the full path of the tool, just like how AC_PATH_{TOO,PROG}
+# would.
+$(foreach TOOL,$(cctools_TOOLS),$(eval darwin_$(TOOL) = $$(build_prefix)/bin/$$(host)-$(call lc,$(TOOL))))
+
 # Flag explanations:
 #
 #     -mlinker-version
@@ -18,18 +60,54 @@ OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-
 #         Explicitly point to our binaries (e.g. cctools) so that they are
 #         ensured to be found and preferred over other possibilities.
 #
-#     -nostdinc++ -isystem $(OSX_SDK)/usr/include/c++/v1
+# -stdlib=libc++ -stdlib++-isystem$(OSX_SDK)/usr/include/c++/v1
 #
 #         Forces clang to use the libc++ headers from our SDK and completely
 #         forget about the libc++ headers from the standard directories
 #
-#         TODO: Once we start requiring a clang version that has the
-#         -stdlib++-isystem<directory> flag first introduced here:
-#         https://reviews.llvm.org/D64089, we should use that instead. Read the
-#         differential summary there for more details.
+#     -Xclang -*system<path_a> \
+#     -Xclang -*system<path_b> \
+#     -Xclang -*system<path_c> ...
+#
+#         Adds path_a, path_b, and path_c to the bottom of clang's list of
+#         include search paths. This is used to explicitly specify the list of
+#         system include search paths and its ordering, rather than rely on
+#         clang's autodetection routine. This routine has been shown to:
+#             1. Fail to pickup libc++ headers in $SYSROOT/usr/include/c++/v1
+#                when clang was built manually (see: https://github.com/bitcoin/bitcoin/pull/17919#issuecomment-656785034)
+#             2. Fail to pickup C headers in $SYSROOT/usr/include when
+#                C_INCLUDE_DIRS was specified at configure time (see: https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9)
+#
+#         Talking directly to cc1 with -Xclang here grants us access to specify
+#         more granular categories for these system include search paths, and we
+#         can use the correct categories that these search paths would have been
+#         placed in if the autodetection routine had worked correctly. (see:
+#         https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9#the-treatment)
+#
+#         Furthermore, it places these search paths after any "non-Xclang"
+#         specified search paths. This prevents any additional clang options or
+#         environment variables from coming after or in between these system
+#         include search paths, as that would be wrong in general but would also
+#         break #include_next's.
 #
-darwin_CC=clang -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -mlinker-version=$(LD64_VERSION) -B$(build_prefix)/bin
-darwin_CXX=clang++ -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -stdlib=libc++ -mlinker-version=$(LD64_VERSION) -B$(build_prefix)/bin -nostdinc++ -isystem $(OSX_SDK)/usr/include/c++/v1
+darwin_CC=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
+	      -u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \
+	      -u LIBRARY_PATH \
+	    $(clang_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \
+	      -B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \
+	      -isysroot$(OSX_SDK) \
+	      -Xclang -internal-externc-isystem$(clang_resource_dir)/include \
+	      -Xclang -internal-externc-isystem$(OSX_SDK)/usr/include
+darwin_CXX=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
+	       -u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \
+	       -u LIBRARY_PATH \
+	     $(clangxx_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \
+	       -B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \
+	       -isysroot$(OSX_SDK) \
+	       -stdlib=libc++ \
+	       -stdlib++-isystem$(OSX_SDK)/usr/include/c++/v1 \
+	       -Xclang -internal-externc-isystem$(clang_resource_dir)/include \
+	       -Xclang -internal-externc-isystem$(OSX_SDK)/usr/include
 
 darwin_CFLAGS=-pipe
 darwin_CXXFLAGS=$(darwin_CFLAGS)
diff --git a/depends/packages/native_cctools.mk b/depends/packages/native_cctools.mk
index d56b636695508..885207fce9af5 100644
--- a/depends/packages/native_cctools.mk
+++ b/depends/packages/native_cctools.mk
@@ -1,86 +1,19 @@
 package=native_cctools
-$(package)_version=55562e4073dea0fbfd0b20e0bf69ffe6390c7f97
+$(package)_version=2ef2e931cf641547eb8a68cfebde61003587c9fd
 $(package)_download_path=https://github.com/tpoechtrager/cctools-port/archive
 $(package)_file_name=$($(package)_version).tar.gz
-$(package)_sha256_hash=e51995a843533a3dac155dd0c71362dd471597a2d23f13dff194c6285362f875
+$(package)_sha256_hash=6b73269efdf5c58a070e7357b66ee760501388549d6a12b423723f45888b074b
 $(package)_build_subdir=cctools
-$(package)_patches=ld64_disable_threading.patch
-
-ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
-$(package)_clang_version=8.0.0
-$(package)_clang_download_path=https://releases.llvm.org/$($(package)_clang_version)
-$(package)_clang_download_file=clang+llvm-$($(package)_clang_version)-x86_64-linux-gnu-ubuntu-14.04.tar.xz
-$(package)_clang_file_name=clang-llvm-$($(package)_clang_version)-x86_64-linux-gnu-ubuntu-14.04.tar.xz
-$(package)_clang_sha256_hash=9ef854b71949f825362a119bf2597f744836cb571131ae6b721cd102ffea8cd0
-endif
-
-$(package)_libtapi_version=3efb201881e7a76a21e0554906cf306432539cef
-$(package)_libtapi_download_path=https://github.com/tpoechtrager/apple-libtapi/archive
-$(package)_libtapi_download_file=$($(package)_libtapi_version).tar.gz
-$(package)_libtapi_file_name=$($(package)_libtapi_version).tar.gz
-$(package)_libtapi_sha256_hash=380c1ca37cfa04a8699d0887a8d3ee1ad27f3d08baba78887c73b09485c0fbd3
-
-$(package)_extra_sources=$($(package)_libtapi_file_name)
-ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
-$(package)_extra_sources += $($(package)_clang_file_name)
-endif
-
-ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
-define $(package)_fetch_cmds
-$(call fetch_file,$(package),$($(package)_download_path),$($(package)_download_file),$($(package)_file_name),$($(package)_sha256_hash)) && \
-$(call fetch_file,$(package),$($(package)_clang_download_path),$($(package)_clang_download_file),$($(package)_clang_file_name),$($(package)_clang_sha256_hash)) && \
-$(call fetch_file,$(package),$($(package)_libtapi_download_path),$($(package)_libtapi_download_file),$($(package)_libtapi_file_name),$($(package)_libtapi_sha256_hash))
-endef
-else
-define $(package)_fetch_cmds
-$(call fetch_file,$(package),$($(package)_download_path),$($(package)_download_file),$($(package)_file_name),$($(package)_sha256_hash)) && \
-$(call fetch_file,$(package),$($(package)_libtapi_download_path),$($(package)_libtapi_download_file),$($(package)_libtapi_file_name),$($(package)_libtapi_sha256_hash))
-endef
-endif
-
-ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
-define $(package)_extract_cmds
-  mkdir -p $($(package)_extract_dir) && \
-  echo "$($(package)_sha256_hash)  $($(package)_source)" > $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  echo "$($(package)_clang_sha256_hash)  $($(package)_source_dir)/$($(package)_clang_file_name)" >> $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  echo "$($(package)_libtapi_sha256_hash)  $($(package)_source_dir)/$($(package)_libtapi_file_name)" >> $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  $(build_SHA256SUM) -c $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  mkdir -p toolchain/bin toolchain/lib/clang/$($(package)_clang_version)/include && \
-  mkdir -p libtapi && \
-  tar --no-same-owner --strip-components=1 -C libtapi -xf $($(package)_source_dir)/$($(package)_libtapi_file_name) && \
-  tar --no-same-owner --strip-components=1 -C toolchain -xf $($(package)_source_dir)/$($(package)_clang_file_name) && \
-  rm -f toolchain/lib/libc++abi.so* && \
-  tar --no-same-owner --strip-components=1 -xf $($(package)_source)
-endef
-else
-define $(package)_extract_cmds
-  mkdir -p $($(package)_extract_dir) && \
-  echo "$($(package)_sha256_hash)  $($(package)_source)" > $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  echo "$($(package)_libtapi_sha256_hash)  $($(package)_source_dir)/$($(package)_libtapi_file_name)" >> $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  $(build_SHA256SUM) -c $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  mkdir -p libtapi && \
-  tar --no-same-owner --strip-components=1 -C libtapi -xf $($(package)_source_dir)/$($(package)_libtapi_file_name) && \
-  tar --no-same-owner --strip-components=1 -xf $($(package)_source)
-endef
-endif
+$(package)_dependencies=native_libtapi
 
 define $(package)_set_vars
-  $(package)_config_opts=--target=$(host) --with-libtapi=$($(package)_extract_dir)
+  $(package)_config_opts=--target=$(host)
   $(package)_ldflags+=-Wl,-rpath=\\$$$$$$$$\$$$$$$$$ORIGIN/../lib
   ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
-  $(package)_config_opts+=--enable-lto-support --with-llvm-config=$($(package)_extract_dir)/toolchain/bin/llvm-config
-  $(package)_cc=$($(package)_extract_dir)/toolchain/bin/clang
-  $(package)_cxx=$($(package)_extract_dir)/toolchain/bin/clang++
-  else
-  $(package)_cc=clang
-  $(package)_cxx=clang++
+  $(package)_config_opts+=--enable-lto-support --with-llvm-config=$(build_prefix)/bin/llvm-config
   endif
-endef
-
-define $(package)_preprocess_cmds
-  CC=$($(package)_cc) CXX=$($(package)_cxx) INSTALLPREFIX=$($(package)_extract_dir) ./libtapi/build.sh && \
-  CC=$($(package)_cc) CXX=$($(package)_cxx) INSTALLPREFIX=$($(package)_extract_dir) ./libtapi/install.sh && \
-  patch -p1 < $($(package)_patch_dir)/ld64_disable_threading.patch
+  $(package)_cc=$(clang_prog)
+  $(package)_cxx=$(clangxx_prog)
 endef
 
 define $(package)_config_cmds
@@ -91,26 +24,10 @@ define $(package)_build_cmds
   $(MAKE)
 endef
 
-ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
 define $(package)_stage_cmds
-  $(MAKE) DESTDIR=$($(package)_staging_dir) install && \
-  mkdir -p $($(package)_staging_prefix_dir)/lib/ && \
-  cd $($(package)_extract_dir) && \
-  cp lib/libtapi.so.6 $($(package)_staging_prefix_dir)/lib/ && \
-  cd $($(package)_extract_dir)/toolchain && \
-  mkdir -p $($(package)_staging_prefix_dir)/lib/clang/$($(package)_clang_version)/include && \
-  mkdir -p $($(package)_staging_prefix_dir)/bin $($(package)_staging_prefix_dir)/include && \
-  cp bin/clang $($(package)_staging_prefix_dir)/bin/ &&\
-  cp -P bin/clang++ $($(package)_staging_prefix_dir)/bin/ &&\
-  cp lib/libLTO.so $($(package)_staging_prefix_dir)/lib/ && \
-  cp -rf lib/clang/$($(package)_clang_version)/include/* $($(package)_staging_prefix_dir)/lib/clang/$($(package)_clang_version)/include/ && \
-  cp bin/dsymutil $($(package)_staging_prefix_dir)/bin/$(host)-dsymutil
+  $(MAKE) DESTDIR=$($(package)_staging_dir) install
 endef
-else
-define $(package)_stage_cmds
-  $(MAKE) DESTDIR=$($(package)_staging_dir) install && \
-  mkdir -p $($(package)_staging_prefix_dir)/lib/ && \
-  cd $($(package)_extract_dir) && \
-  cp lib/libtapi.so.6 $($(package)_staging_prefix_dir)/lib/
+
+define $(package)_postprocess_cmds
+  rm -rf share
 endef
-endif
diff --git a/depends/packages/native_clang.mk b/depends/packages/native_clang.mk
new file mode 100644
index 0000000000000..36adeb196dc77
--- /dev/null
+++ b/depends/packages/native_clang.mk
@@ -0,0 +1,26 @@
+package=native_clang
+$(package)_version=10.0.1
+$(package)_download_path=https://github.com/llvm/llvm-project/releases/download/llvmorg-$($(package)_version)
+$(package)_download_file=clang+llvm-$($(package)_version)-x86_64-linux-gnu-ubuntu-16.04.tar.xz
+$(package)_file_name=clang+llvm-$($(package)_version)-x86_64-linux-gnu-ubuntu-16.04.tar.xz
+$(package)_sha256_hash=48b83ef827ac2c213d5b64f5ad7ed082c8bcb712b46644e0dc5045c6f462c231
+
+define $(package)_preprocess_cmds
+  rm -f $($(package)_extract_dir)/lib/libc++abi.so*
+endef
+
+define $(package)_stage_cmds
+  mkdir -p $($(package)_staging_prefix_dir)/lib/clang/$($(package)_version)/include && \
+  mkdir -p $($(package)_staging_prefix_dir)/bin && \
+  mkdir -p $($(package)_staging_prefix_dir)/include && \
+  cp bin/clang $($(package)_staging_prefix_dir)/bin/ && \
+  cp -P bin/clang++ $($(package)_staging_prefix_dir)/bin/ && \
+  cp bin/dsymutil $($(package)_staging_prefix_dir)/bin/$(host)-dsymutil && \
+  cp bin/llvm-config $($(package)_staging_prefix_dir)/bin/ && \
+  cp lib/libLTO.so $($(package)_staging_prefix_dir)/lib/ && \
+  cp -rf lib/clang/$($(package)_version)/include/* $($(package)_staging_prefix_dir)/lib/clang/$($(package)_version)/include/
+endef
+
+define $(package)_postprocess_cmds
+  rmdir include
+endef
diff --git a/depends/packages/native_libtapi.mk b/depends/packages/native_libtapi.mk
new file mode 100644
index 0000000000000..60b898da5f2fd
--- /dev/null
+++ b/depends/packages/native_libtapi.mk
@@ -0,0 +1,20 @@
+package=native_libtapi
+$(package)_version=664b8414f89612f2dfd35a9b679c345aa5389026
+$(package)_download_path=https://github.com/tpoechtrager/apple-libtapi/archive
+$(package)_download_file=$($(package)_version).tar.gz
+$(package)_file_name=$($(package)_version).tar.gz
+$(package)_sha256_hash=62e419c12d1c9fad67cc1cd523132bc00db050998337c734c15bc8d73cc02b61
+
+ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
+$(package)_dependencies=native_clang
+endif
+
+define $(package)_build_cmds
+  CC=$(clang_prog) CXX=$(clangxx_prog) INSTALLPREFIX=$($(package)_staging_prefix_dir) ./build.sh
+endef
+
+define $(package)_stage_cmds
+  ./install.sh && \
+  mkdir -p $($(package)_staging_prefix_dir)/include/llvm-c && \
+  cp src/llvm/include/llvm-c/lto.h $($(package)_staging_prefix_dir)/include/llvm-c
+endef
diff --git a/depends/packages/packages.mk b/depends/packages/packages.mk
index d4e1e8fb9026f..265272782c350 100644
--- a/depends/packages/packages.mk
+++ b/depends/packages/packages.mk
@@ -23,5 +23,10 @@ multiprocess_native_packages = native_libmultiprocess native_capnp
 darwin_native_packages = native_biplist native_ds_store native_mac_alias
 
 ifneq ($(build_os),darwin)
-darwin_native_packages += native_cctools native_libdmg-hfsplus
+darwin_native_packages += native_cctools native_libtapi native_libdmg-hfsplus
+
+ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
+darwin_native_packages+= native_clang
+endif
+
 endif
diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
index 4958558b6ee5a..935429d0b0a6c 100644
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -12,7 +12,6 @@ $(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch
 $(package)_patches+= fix_rcc_determinism.patch fix_riscv64_arch.patch xkb-default.patch no-xlib.patch
 $(package)_patches+= fix_android_qmake_conf.patch fix_android_jni_static.patch dont_hardcode_pwd.patch
 $(package)_patches+= freetype_back_compat.patch drop_lrelease_dependency.patch fix_powerpc_libpng.patch
-$(package)_patches+= fix_qpainter_non_determinism.patch
 
 # Update OSX_QT_TRANSLATIONS when this is updated
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
diff --git a/depends/patches/native_cctools/ld64_disable_threading.patch b/depends/patches/native_cctools/ld64_disable_threading.patch
deleted file mode 100644
index d6c58c102fb32..0000000000000
--- a/depends/patches/native_cctools/ld64_disable_threading.patch
+++ /dev/null
@@ -1,26 +0,0 @@
-commit 584668415039adeed073decee7e04de28248afd3
-Author: fanquake <fanquake@gmail.com>
-Date:   Tue Aug 18 01:20:24 2020 +0000
-
-    Disable threading to fix non-determinism
-
-    A bug in the file parser can cause dependencies to be calculated
-    differently based on which files have already been parsed. This is more
-    likely to occur on systems with more CPUs.
-
-    Just disable threading for now. There is no noticable slowdown.
-
-    See #9891.
-
-diff --git a/cctools/ld64/src/ld/InputFiles.h b/cctools/ld64/src/ld/InputFiles.h
-index ef9c756..90a70b6 100644
---- a/cctools/ld64/src/ld/InputFiles.h
-+++ b/cctools/ld64/src/ld/InputFiles.h
-@@ -25,7 +25,6 @@
- #ifndef __INPUT_FILES_H__
- #define __INPUT_FILES_H__
-
--#define HAVE_PTHREADS 1
-
- #include <stdlib.h>
- #include <sys/types.h>
diff --git a/depends/patches/qt/fix_qpainter_non_determinism.patch b/depends/patches/qt/fix_qpainter_non_determinism.patch
deleted file mode 100644
index 3cfcc22f03a00..0000000000000
--- a/depends/patches/qt/fix_qpainter_non_determinism.patch
+++ /dev/null
@@ -1,63 +0,0 @@
-commit 2a8f7dc6ddfc414a66491522501c1574a1343ee1
-Author: Andrew Chow <achow101-github@achow101.com>
-Date:   Sat Nov 21 01:11:04 2020 -0500
-
-    build: Fix determinism issue when building with Clang 8
-
-    When building Qt with LLVM/Clang 8 under -O3 (the default), we run into
-    a determinism issue in `qt_interset_spans`. The issue has been fixed for
-    LLVM/Clang 9, see
-    https://github.com/llvm/llvm-project/commit/db101864bdc938deb1d63fe4f7da761bd38e5cae
-    and https://reviews.llvm.org/D64601, however this fix was not backported
-    to 8.x. Once LLVM/Clang 9 is used, this patch can be dropped.
-
-    The particular issue appears to be an optimization done by -O3 which
-    adds a temporary variable for `spans->y` in `qt_intersect_spans`. When
-    it does this, sometimes it chooses to use a 32-bit movs instruction
-    (movswl), and other times it chooses a 64-bit movs instruction (movswq).
-    By patching `qt_intersect_spans` to always make a temporary variable for
-    `spans->y`, we are able to sidestep this problem.
-
-diff --git a/qtbase/src/gui/painting/qpaintengine_raster.cpp b/qtbase/src/gui/painting/qpaintengine_raster.cpp
-index 92ab6e8375..f018009e0b 100644
---- a/qtbase/src/gui/painting/qpaintengine_raster.cpp
-+++ b/qtbase/src/gui/painting/qpaintengine_raster.cpp
-@@ -3971,22 +3971,23 @@ static const QSpan *qt_intersect_spans(const QClipData *clip, int *currentClip,
-     const QSpan *clipEnd = clip->m_spans + clip->count;
- 
-     while (available && spans < end ) {
-+        const short spans_y = spans->y;
-         if (clipSpans >= clipEnd) {
-             spans = end;
-             break;
-         }
--        if (clipSpans->y > spans->y) {
-+        if (clipSpans->y > spans_y) {
-             ++spans;
-             continue;
-         }
--        if (spans->y != clipSpans->y) {
--            if (spans->y < clip->count && clip->m_clipLines[spans->y].spans)
--                clipSpans = clip->m_clipLines[spans->y].spans;
-+        if (spans_y != clipSpans->y) {
-+            if (spans_y < clip->count && clip->m_clipLines[spans_y].spans)
-+                clipSpans = clip->m_clipLines[spans_y].spans;
-             else
-                 ++clipSpans;
-             continue;
-         }
--        Q_ASSERT(spans->y == clipSpans->y);
-+        Q_ASSERT(spans_y == clipSpans->y);
- 
-         int sx1 = spans->x;
-         int sx2 = sx1 + spans->len;
-@@ -4005,7 +4006,7 @@ static const QSpan *qt_intersect_spans(const QClipData *clip, int *currentClip,
-         if (len) {
-             out->x = qMax(sx1, cx1);
-             out->len = qMin(sx2, cx2) - out->x;
--            out->y = spans->y;
-+            out->y = spans_y;
-             out->coverage = qt_div_255(spans->coverage * clipSpans->coverage);
-             ++out;
-             --available;
-